DjangoCMS - 无法导入名称'NamespaceAlreadyRegistered'

Question

我用DjangCMS(3.7.2(开发了一个简单的项目，它在本地运行得很好。我将在ubuntu服务器上运行它，我有另一个Django项目在上面运行，没有任何问题。我的两个项目都是使用python 3.6&MySQL数据库。我采取了以下步骤来运行我的新项目：

1. 通过git从服务器克隆项目并更新settings.py文件
2. 在服务器上创建了一个空数据库
3. python3 -m venv venv在服务器上安装了虚拟机
4. 激活venv并升级pip
5. 使用pip install -r requirements.txt成功安装需求
6. 尝试通过python3 manage.py migrate进行迁移

但我得到了这个错误：

Traceback (most recent call last):
File "manage.py", line 21, in <module>
main()
File "manage.py", line 17, in main
execute_from_command_line(sys.argv)
File "/var/www/pishbiny/myenv/lib/python3.6/site-packages/django/core/management/__init__.py", line 401, in execute_from_command_line
utility.execute()
File "/var/www/pishbiny/myenv/lib/python3.6/site-packages/django/core/management/__init__.py", line 377, in execute
django.setup()
File "/var/www/pishbiny/myenv/lib/python3.6/site-packages/django/__init__.py", line 24, in setup
apps.populate(settings.INSTALLED_APPS)
File "/var/www/pishbiny/myenv/lib/python3.6/site-packages/django/apps/registry.py", line 114, in populate
app_config.import_models()
File "/var/www/pishbiny/myenv/lib/python3.6/site-packages/django/apps/config.py", line 211, in import_models
self.models_module = import_module(models_module_name)
File "/usr/lib/python3.6/importlib/__init__.py", line 126, in import_module
return _bootstrap._gcd_import(name[level:], package, level)
File "<frozen importlib._bootstrap>", line 994, in _gcd_import
File "<frozen importlib._bootstrap>", line 971, in _find_and_load
File "<frozen importlib._bootstrap>", line 955, in _find_and_load_unlocked
File "<frozen importlib._bootstrap>", line 665, in _load_unlocked
File "<frozen importlib._bootstrap_external>", line 678, in exec_module
File "<frozen importlib._bootstrap>", line 219, in _call_with_frames_removed
File "/var/www/pishbiny/myenv/lib/python3.6/site-packages/cms/models/__init__.py", line 3, in <module>
from .pagemodel import *  # nopyflakes
File "/var/www/pishbiny/myenv/lib/python3.6/site-packages/cms/models/pagemodel.py", line 31, in <module>
from menus.menu_pool import menu_pool
File "/var/www/pishbiny/myenv/lib/python3.6/site-packages/menus/menu_pool.py", line 18, in <module>
from menus.exceptions import NamespaceAlreadyRegistered
ImportError: cannot import name 'NamespaceAlreadyRegistered'

• 服务器上安装了以下依赖项：

asgiref                    3.2.7
chardet                    3.0.4
cms                        0.0.2
dj-database-url            0.5.0
Django                     3.0.5
django-classy-tags         1.0.0
django-cms                 3.7.2
django-filer               1.7.0
django-formtools           2.2
django-js-asset            1.2.2
django-mptt                0.11.0
django-polymorphic         2.1.2
django-sekizai             1.1.0
django-treebeard           4.3.1
djangocms-admin-style      1.5.0
djangocms-attributes-field 1.2.0
djangocms-bootstrap4       1.6.0
djangocms-file             2.4.0
djangocms-googlemap        1.4.0
djangocms-icon             1.5.0
djangocms-installer        1.2.3
djangocms-link             2.6.0
djangocms-picture          2.4.0
djangocms-snippet          2.3.0
djangocms-style            2.3.0
djangocms-text-ckeditor    3.9.0
djangocms-video            2.3.0
dsdev-utils                1.0.4
easy-thumbnails            2.7
html5lib                   1.0.1
Menus                      0.2.0
mysqlclient                1.4.6
Pillow                     7.1.2
pip                        20.1
pkg-resources              0.0.0
pytz                       2020.1
setuptools                 39.0.1
six                        1.14.0
sqlparse                   0.3.1
tzlocal                    2.0.0
Unidecode                  1.1.1
webencodings               0.5.1
wheel                      0.34.2

我删除了venv，并多次重新安装所有依赖项，但都不起作用。让我知道我犯了什么错。非常感谢您能提供的任何帮助。

Answer 1

如Alasdair所述：

我通过运行python3 -m pip install "django-cms==3.7.2"重新安装了Django CMS模块，令人惊讶的是它竟然能工作。